CN211708097U - Double argon blowing long nozzle - Google Patents
Double argon blowing long nozzle Download PDFInfo
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- CN211708097U CN211708097U CN202020119477.2U CN202020119477U CN211708097U CN 211708097 U CN211708097 U CN 211708097U CN 202020119477 U CN202020119477 U CN 202020119477U CN 211708097 U CN211708097 U CN 211708097U
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Abstract
The utility model discloses a double argon blowing long nozzle, which comprises a body, a slag line part, an anti-explosion lining and an iron shell; the anti-explosion lining is arranged on the inner walls of the body and the slag line part, the upper end of the body is of a bowl structure, and one side of the bowl structure is provided with a blowing nozzle; the bowl structure comprises a bowl structure body and is characterized in that a plurality of grooves are formed in the position of a bowl opening of the bowl structure body, an annular groove is formed in the inner wall of the bowl structure body, and the annular groove is coaxial with the bowl structure body; an annular air cavity is arranged between the iron shell and the body and is used for connecting the groove, the through hole and the blowing nozzle. Double sealing is carried out on the molten steel in the long nozzle to isolate oxygen; the purity of the molten steel is improved, and the service life of the long nozzle is ensured; the annular air cavity is simultaneously connected and communicated with the middle annular groove of the bowl structure and the plurality of grooves at the top, so that the smoothness of the circulation of argon is ensured, and a tight air wall is formed in time.
Description
Technical Field
The utility model relates to a continuous casting equipment field especially relates to a two long mouths of a river that blow argon.
Background
The long nozzle is an important part for connecting the ladle and the tundish in continuous casting operation, the upper part of the long nozzle is matched with the upper nozzle of the ladle, the lower part of the long nozzle is inserted into the tundish, and the long nozzle is inserted into the tundish about 150-300mm below the liquid level of the tundish during normal use and plays a role in connecting the ladle and the tundish to prevent secondary oxidation of molten steel and splashing of the molten steel. The baking-free use and the multiple use are required. The refractory material is an indispensable important functional refractory material for protecting and casting molten steel and improving the product quality, and the using effect of the refractory material directly influences the smooth operation and the stable quality of the whole continuous casting process. During the process that molten steel flows from a ladle to a tundish, the effect of protecting pouring depends on the sealing effect between a ladle down nozzle and a long nozzle.
Usually, the contact surface of the long nozzle and the ladle lower nozzle is a straight conical surface, the contact surface is sealed by a flexible refractory fiber gasket, however, the matching precision is influenced by factors such as dimensional tolerance control, die abrasion, burning loss in the production process, molten steel erosion and the like, the sealing effect is difficult to control actually, the flow and pressure of introduced argon are fluctuated, the fluctuation of the casting effect of molten steel protection is further caused, and the problem can not be solved by simply adjusting the argon amount obviously. The prior Chinese patent CN208322099U discloses a curved-surface sealed double-channel argon blowing long nozzle structure, which comprises a horn-mouth-shaped curved surface at the contact surface of a long nozzle and a ladle nozzle, a flexible refractory fiber gasket is arranged between the long nozzle and the ladle nozzle, an upper argon gas supply inlet communicated with the contact surface of the long nozzle and the ladle nozzle is arranged at the upper part of the long nozzle, and a lower argon gas supply inlet communicated with a long nozzle steel flow inlet is arranged below the contact surface of the long nozzle and the ladle nozzle. The utility model discloses a set up two argon gas entries only in regional middle part of long mouth of a river bowl portion and bottom, can not realize sealed function. The prior Chinese patent CN104139179B discloses a multifunctional argon blowing long nozzle, wherein a bowl part of the long nozzle is provided with an air blowing pipe, a sealing conduit and a sealing ventilation ring; the lower part is provided with an annular ventilation chamber and ventilation holes, an argon blowing guide pipe is connected between the air blowing pipe and the annular ventilation chamber, and the ratio of the sectional area of the argon blowing guide pipe to the sectional area of the sealing guide pipe is set to be 1 (1-5). On the circumference of the annular air permeable chamber, at least one row of air permeable holes which are uniformly distributed are formed in the long nozzle body, and at least four air permeable holes are formed in each row. In the process of pouring molten steel from a steel ladle to a tundish, argon introduced from the outside is connected into an air blowing pipe, and then is respectively pressed and sent into a sealed air permeable ring and an annular air permeable chamber according to the flow ratio of 1 (1-5); according to the invention, the air holes and the annular air permeable chamber are arranged at the 1/2 position of the height of the long nozzle body, so that the bubbles can be broken into finer bubbles by utilizing the shearing force generated by the flowing of the molten steel, thereby facilitating the capturing of impurities, but the flowing of the molten steel is not beneficial to the floating of the impurities.
Therefore, it is urgently needed to design a double argon blowing long nozzle which can realize complete sealing and casting blank cleaning at the same time.
Disclosure of Invention
For solving the above-mentioned prior art problem, the utility model provides a two long mouths of a river that blow argon both can improve the cleanliness of casting blank, and more important all can keep apart oxygen completely to the molten steel.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the double argon blowing long nozzle comprises a body, a slag line part, an anti-explosion lining and an iron shell, wherein the anti-explosion lining is arranged on the inner walls of the body and the slag line part to form a central hole; the body upper end is bowl portion structure, two argon blowing long mouths of a river still include:
the air blowing nozzle is arranged on one side of the bowl structure;
the groove is arranged at the bowl opening position of the bowl structure;
the annular groove is arranged on the inner wall of the bowl structure and is coaxial with the bowl structure;
and the annular air cavity is arranged between the iron shell and the body and is used for connecting the groove, the through hole and the blowing nozzle.
Preferably, the annular groove is connected with the annular air cavity through a through hole.
Preferably, the grooves are equally spaced along the circumference of the bowl mouth.
Preferably, the grooves have a width in the range of 18-22mm and a depth in the range of 1-3 mm.
Preferably, a ventilation net is arranged between the blowing nozzle and the annular air cavity.
Preferably, the annular air cavity is internally sleeved with a ventilation net.
Preferably, the air-permeable net adopts a dispersive air-permeable functional material or an air-permeable circular seam.
Preferably, the flow of argon in the recess is between 5.5 and 6L/min.
Preferably, the flow rate of argon gas in the through hole is 2.5-3.5L/min.
Preferably, the body is provided with a diameter-variable part at the middle upper part.
Preferably, the upper end of the iron shell is fixed at the top of the double argon blowing long nozzle, and the bottom end of the iron shell is fixed at a position 25-35mm away from the bottom end of the variable diameter part.
Preferably, the diameter of the central hole increases linearly from top to bottom in the axial direction of the central hole.
Preferably, the bowl bottom and the inner wall of the bowl structure are in right-angle transition to form a ladle connection platform.
The technical scheme of the utility model prior art relatively has following technological effect:
firstly, the top end of the bowl structure is provided with a plurality of grooves and the middle position is provided with an annular groove, and the two types of grooves act together to carry out double sealing on the molten steel in the long nozzle and isolate oxygen; the purity of the molten steel is improved, and the service life of the long nozzle is ensured.
Two, the utility model discloses set up annular air cavity, link up with the middle part annular groove of bowl portion structure and a plurality of groove connection at top simultaneously, guaranteed the smooth and easy nature of circulation of argon gas, in time form tight gas wall.
Thirdly, the utility model discloses the narrow-top is wide down of centre bore, can effectively reduce the velocity of flow of molten steel, alleviates the washing away to the inner wall.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of the present invention in embodiment 1.
Fig. 2 is the groove structure diagram of the present invention.
Fig. 3 is a schematic structural view of the present invention in embodiment 2.
Reference numerals: 1-body; 2-anti-explosion lining; 3-a slag line part; 4-a blowing nozzle; 5-a groove; 6-through holes; 7-an annular air cavity; 8-an annular groove; 9-iron shell; 10-bowl configuration; 11-a breathable net; 12-center hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
Example 1
As shown in fig. 1, the double argon blowing long nozzle comprises a body 1, a slag line part 3 and an anti-explosion lining 2; the height of the body 1 is 800mm, the height of the slag line part 3 is 300mm, a diameter-changing part with the height of 95mm is arranged at the middle upper part of the body 1, the diameter of the body 1 after diameter changing is 145mm, and the diameter of the body 1 before diameter changing is 215 mm; the anti-explosion lining 2 is arranged on the inner walls of the body 1 and the slag line part 3 to form a central hole 12, particularly arranged at the lower end of the bowl part structure 10, and the anti-explosion lining 2 is mainly made of carbon-free materials. The diameter of the central hole 12 increases linearly from top to bottom in the axial direction of the central hole 12, the central hole 12 is narrow at the top and wide at the bottom, the minimum diameter of the upper end is 78mm, and the maximum diameter of the lower end is 85 mm. The molten steel can slow down the flow velocity after flowing out from the bowl structure 10, and the scouring of the slag line part is reduced. An iron shell 9 is arranged on the outer layer of the upper end of the body 1, and the height of the iron shell 9 is 215 mm; the top at two long mouths of a river of blowing argon is fixed to the upper end of iron-clad 9, and the bottom mounting of iron-clad 9 is in distance variable diameter portion bottom 30mm department, and the high body that covers of 30mm is prolonged downwards again after 9 covers the variable diameter portion promptly, because two long mouths of a river of blowing argon are in the use to variable diameter portion lower extreme makes a round trip to rotate as the pivot, so the 30mm iron-clad that come out more can effectual protection body, the life of extension body. The upper end of the body 1 is provided with a bowl structure 10, the diameter of the bowl opening of the bowl structure 10 is 136mm, the diameter of the bowl bottom is 123mm, and the height of the bowl structure 10 is 55 mm; the bowl bottom and the inner wall of the bowl structure 10 are in right-angle transition to form a ladle connection platform, and the connection platform is used for connecting a long nozzle and a ladle, namely, the shape of a steel tapping hole of the ladle is matched with the shape of the connection platform.
One side of the bowl structure 10 is provided with a blowing nozzle 4; the length of the air blowing nozzle 4 is 35 mm; the air blowing nozzle 4 penetrates through the iron shell 9 and is directly connected with an annular air cavity 7 arranged between the iron shell 9 and the body 1, and a ventilation net 11 is arranged between the air blowing nozzle 4 and the annular air cavity 7; the air-permeable net 11 can adopt a dispersive air-permeable functional material or an air-permeable circular seam. The bottom surface of the annular air cavity 7 is an inclined surface for increasing the argon gas capacity and buffering the argon gas capacity.
As shown in fig. 2, 12 grooves 5 are arranged at the bowl mouth of the bowl structure 10, and the grooves 5 are distributed at equal intervals along the circumference of the bowl mouth and are communicated with the annular air cavity 7; the width range of the groove 5 is 18-22mm, and the depth range is 1-3 mm; the groove 5 penetrates through argon gas to form an annular argon gas seal at the bowl mouth; isolating oxygen to form complete air curtain. The flow rate of argon gas in the groove 5 is 5.5-6L/min.
An annular groove 8 is arranged on the inner wall of the bowl structure 10, and the annular groove 8 is coaxial with the bowl structure 10; the annular groove 8 is connected with the annular air cavity 7 through the through hole 6; and the double-layer sealing is formed with the groove, so that nitrogen is not added when the steel ladle pours molten steel into the tundish, and the purity of the molten steel is improved. The flow rate of argon gas in the through-hole 6 is 2.5-3.5L/min.
When the double-argon-blowing long nozzle is used, the double-argon-blowing long nozzle is arranged between a steel ladle and a tundish, the bowl structure 10 of the double-argon-blowing long nozzle is matched with a lower nozzle of the steel ladle for use, argon is continuously blown in through the blowing nozzle 4 in the process of transferring molten steel from the steel ladle to the tundish, the molten steel enters the annular air cavity 7 after passing through the ventilation net 11, and the argon in the annular air cavity 7 completely seals the space between the iron shell 9 and the body 1; then, a uniform air curtain is formed by 12 equidistant grooves 5 at the bowl opening, so that oxygen is effectively isolated; the argon gas in the annular groove 8 can be further isolated from air by entering the annular groove 8 through the through hole 6.
Example 2
As shown in fig. 3, the present embodiment 2 is different from embodiment 1 in that the air-permeable net 11 is sleeved in the annular air cavity 7, i.e. the air-permeable net 11 is annular with a shape similar to the annular air cavity 7.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The double argon blowing long nozzle comprises a body, a slag line part, an anti-explosion lining and an iron shell, wherein the anti-explosion lining is arranged on the inner walls of the body and the slag line part to form a central hole; the body upper end is bowl portion structure, its characterized in that: the long mouth of a river of two argon bleeds still includes:
the air blowing nozzle is arranged on one side of the bowl structure;
the groove is arranged at the bowl opening position of the bowl structure;
the annular groove is arranged on the inner wall of the bowl structure and is coaxial with the bowl structure;
and the annular air cavity is arranged between the iron shell and the body and is used for connecting the groove, the through hole and the blowing nozzle.
2. The double argon blowing long nozzle according to claim 1, characterized in that: the middle upper part of the body is provided with a diameter-variable part.
3. The double argon blowing long nozzle according to claim 1, characterized in that: the annular groove is connected with the annular air cavity through the through hole.
4. The double argon blowing long nozzle according to claim 1, characterized in that: the grooves are distributed at equal intervals along the circumference of the bowl mouth.
5. The double argon blowing long nozzle according to claim 1, characterized in that: the width of the groove ranges from 18 mm to 22mm, and the depth ranges from 1 mm to 3 mm.
6. The double argon blowing long nozzle according to claim 1, characterized in that: and a ventilating net is arranged between the air blowing nozzle and the annular air cavity.
7. The double argon blowing long nozzle according to claim 6, characterized in that: the breathable net is made of a dispersive breathable functional material or a breathable circular seam.
8. The double argon blowing long nozzle according to claim 1, characterized in that: the diameter of the central hole increases linearly from top to bottom along the axial direction of the central hole.
9. The double argon blowing long nozzle according to claim 1, characterized in that: the flow of argon in the groove is 5.5-6L/min.
10. The double argon blowing long nozzle according to claim 1, characterized in that: the argon flow in the annular groove is 2.5-3.5L/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020119477.2U CN211708097U (en) | 2020-01-19 | 2020-01-19 | Double argon blowing long nozzle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020119477.2U CN211708097U (en) | 2020-01-19 | 2020-01-19 | Double argon blowing long nozzle |
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| Publication Number | Publication Date |
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| CN211708097U true CN211708097U (en) | 2020-10-20 |
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| CN202020119477.2U Active CN211708097U (en) | 2020-01-19 | 2020-01-19 | Double argon blowing long nozzle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112404380A (en) * | 2020-10-29 | 2021-02-26 | 宝钢特钢韶关有限公司 | Method for reducing inclusions in bearing steel and continuous casting argon blowing control method |
| CN113953503A (en) * | 2021-10-23 | 2022-01-21 | 宜兴市耐火材料有限公司 | Long nozzle for molten steel continuous casting production |
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2020
- 2020-01-19 CN CN202020119477.2U patent/CN211708097U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112404380A (en) * | 2020-10-29 | 2021-02-26 | 宝钢特钢韶关有限公司 | Method for reducing inclusions in bearing steel and continuous casting argon blowing control method |
| CN112404380B (en) * | 2020-10-29 | 2021-12-10 | 宝钢特钢韶关有限公司 | Method for reducing inclusions in bearing steel and continuous casting argon blowing control method |
| CN113953503A (en) * | 2021-10-23 | 2022-01-21 | 宜兴市耐火材料有限公司 | Long nozzle for molten steel continuous casting production |
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